1 /* linux/arch/arm/mach-s3c2410/gpio.c
3 * Copyright (c) 2004-2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * 15-Jan-2006 LCVR Splitted from gpio.c
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/module.h>
29 #include <linux/interrupt.h>
30 #include <linux/ioport.h>
32 #include <asm/hardware.h>
36 #include <asm/arch/regs-gpio.h>
38 int s3c2410_gpio_irqfilter(unsigned int pin
, unsigned int on
,
41 void __iomem
*reg
= S3C2410_EINFLT0
;
45 if (pin
< S3C2410_GPG8
|| pin
> S3C2410_GPG15
)
50 pin
-= S3C2410_GPG8_EINT16
;
53 local_irq_save(flags
);
55 /* update filter width and clock source */
57 val
= __raw_readl(reg
);
58 val
&= ~(0xff << ((pin
& 3) * 8));
59 val
|= config
<< ((pin
& 3) * 8);
60 __raw_writel(val
, reg
);
62 /* update filter enable */
64 val
= __raw_readl(S3C2410_EXTINT2
);
65 val
&= ~(1 << ((pin
* 4) + 3));
66 val
|= on
<< ((pin
* 4) + 3);
67 __raw_writel(val
, S3C2410_EXTINT2
);
69 local_irq_restore(flags
);
74 EXPORT_SYMBOL(s3c2410_gpio_irqfilter
);
76 int s3c2410_gpio_getirq(unsigned int pin
)
78 if (pin
< S3C2410_GPF0
|| pin
> S3C2410_GPG15_EINT23
)
79 return -1; /* not valid interrupts */
81 if (pin
< S3C2410_GPG0
&& pin
> S3C2410_GPF7
)
82 return -1; /* not valid pin */
84 if (pin
< S3C2410_GPF4
)
85 return (pin
- S3C2410_GPF0
) + IRQ_EINT0
;
87 if (pin
< S3C2410_GPG0
)
88 return (pin
- S3C2410_GPF4
) + IRQ_EINT4
;
90 return (pin
- S3C2410_GPG0
) + IRQ_EINT8
;
93 EXPORT_SYMBOL(s3c2410_gpio_getirq
);